<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Launch countdown example</title>
    <style>

    </style>
  </head>
  <body>


    <script>
        let i = 10;

        while(i >= 0) {
            const para = document.createElement('p');;
            if (i === 10)  {
                para.textContent = 'Countdown ' + i;
            } else if (i === 0) {
                para.textContent = 'Blast off!';
            } else {
                para.textContent = i;
            }
            document.body.appendChild(para);;
            i--;
        }
        
   
    </script>

  </body>
</html>
